Orycterocetus is an extinct genus of sperm whale from the Miocene of the northern Atlantic Ocean.
Orycterocetus is an extinct genus of sperm whale from the Miocene of the northern Atlantic Ocean.
==Classification== Orycterocetus is a member of Physeteroidea closely related to crown-group sperm whales. The type species, O. quadratidens, was first named by Joseph Leidy on the basis of two teeth, two partial mandibular rami, and a rib from Neogene deposits of Virginia. Two more species were subsequently described, O. cornutidens Leidy 1856 and O. crocodilinus Cope, 1868, the latter from the middle Miocene Calvert Formation. ==Description== The distinction between O. quadratidens and O. crocodilinus is tentative, based on subtle dental differences such as the quadrate root cross-section in O. quadratidens, with overlapping morphology including conical shape, open pulp cavities, and longitudinal fluting; formal synonymy has not been established due to uncertain provenance of the type material. No other species are definitively assigned to the genus, though fragmentary remains, such as a partial mandible from the late Miocene [Pietra lecces formation]] in southern Italy, suggest possible intraspecific variation or undescribed diversity; this specimen exhibits a longer symphysis (estimated 400–420 mm) and 10–13 mandibular alveoli, provisionally attributed to Orycterocetus sp. and hinting at larger-bodied variants. Some unrecorded species may have exceeded long.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).